// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef LIBRARIES_NACL_IO_FIFO_INTERFACE_H_
#define LIBRARIES_NACL_IO_FIFO_INTERFACE_H_
#include <stdint.h>
#include <stdlib.h>
namespace nacl_io {
// FIFOInterface
//
// FIFOInterface provides a common interface for Emitters to update their
// signalled state. FIFOs do not have any internal locking and instead
// reply on a parent (usually an emitter) to lock for them as appropriate.
class FIFOInterface {
public:
virtual ~FIFOInterface() {};
virtual bool IsEmpty() = 0;
virtual bool IsFull() = 0;
virtual bool Resize(size_t len) = 0;
virtual size_t ReadAvailable() = 0;
virtual size_t WriteAvailable() = 0;
};
} // namespace nacl_io
#endif // LIBRARIES_NACL_IO_FIFO_INTERFACE_H_